1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1404c08d20f55c558f59c6c5a88cc6a55d90ccb5962ea41ff005e7d1b0185e4b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d6c17ad-b572-45c5-9d87-abc10be61e23.json and https://artists.proofprofile.net/proofs/artist/1d6c17ad-b572-45c5-9d87-abc10be61e23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadfb872c3ffc3718174a58ba53d190fd5d1c4f96ce6d76909782d60c575f7c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1789953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee3abe3bc0c0b70b98e47ad872eb348452e9ac54a330027a04c82bff7cb6841. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1789958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89dd42f1001754c71b9807f51c6b9303b7f7152c23441ba988e4f4071b0cc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa0b6934a1f42e9375ac08f6ee48b8dc6c6f7501c576fc3796dff945dc46145. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edfee643e9e58735fb5d73c710a9045cf9a8fc6885a517468427d8a47384d17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d922034fc364bac75091cf0cf7db0de6daa8609b164220a27ff47fc9d2431b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1789960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf49a0bfc405b11a32b710408236b647b7798df6bb15ad6726f15010a891a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd73b3147f3e68ba5b3300abf0a8b1a9c50f14c69971b7a567ab5068a6a45f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d15a0b920525f36d303b621e300b494628292e55892f0916629cec96c80a14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6927bf50b735e7968e8eda8fe51524df6ee453b8a716d94224e7375ee1956. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d92ff8d7b707d6df7e14bf90abbb7d3538d7411902adcb970d755126e544c20. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480289.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93760dda92382594a4d54cb31d82e3d19101599b8d58f2b8811354bb871148d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b53831061cd51eafa9ccb66a314dae603a0f083df3167839656adb6de97255. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c35a3a674a6a6298caa83ce2c223433ec17c69429358c0a0deffe5cb414ea. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a6c62db331fe4afda5ca3927810faeef5e0e129fc4e2ee588921fd63443733. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1789959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e170b9024958720b7befe480c076223aef83605a25e225396bd43b1678a57. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af16565b4e5082347225ea1747297287bebf7dd28b78fc8afb60a0647f6575. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221446e2ef9cf9d2017b84940185f5739501e84de805848f6e3a0bcfa6241db7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84185548ce3f6336f043400e0466008596555b40c7e247f507db6ee455975fcf. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACU1603598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400098087301211d91ba45312499e265dd9060d1b95b214a466830b8815148c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACU1603582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d7b0d151962e1466111a272d313395e0c5cfc09703017becd5b86052d3f523. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2861cf3b074335120de76a9adb12b146ff50aa4cb90bdeebc10c2b9e3d46a10. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa98acfd9d42668ac9594993c20f5ad8fda8bd7834480917fc810c53db6d270. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACU1603585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb36604a881fab43022a12a4241b3a2277fc4f151e4090a26160c9b405d4646. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHW2480480.